Clasp



Feb. 5, 1929.

s. A. JoHNsQN CLASP Filed latch 26, 1928 A TTORNEYS.

Se ot one of the end guide linlis.

Patented Feb. 5, 1929. p

UNITED STATES PATENroI-*Flee sYLvEsrnR A. JOHNSON, or NORTH PROVIDENCE, RHODE ISLAND; V.lise-lemon `'re srnmnr. mtos., or PROVIDENCE, ItI-Ionn IeLANn, A rum comosnn or runnenl sPErDEL, Ivm-meme srnInnI., BOTH or rroznmu, GERMANY, .um EDWIN-1r. `111x'. sI-EIDEL AND ALBERT n. It. sPnInnL, BOTH Or` eRnNsroN, RHODE ISLAND..

CLASP.

Application led `ldarch "26, 1328. Seriell No. 264,85.` l

This invention relates to en improved clasp for detechehly connectlng togetherI oppositie ends of e chain; :ind the object or this invention is to so arrange the `adjacent end units ot' the chain that they nnly he readily connected und locked together to he disenfguged troni each other at the will of the user.

ii. further object of the invention is to provide n clasp of this chnriicter Ti'or use on :in

io entendible cheinhnving guide links and slide linlie ettendihle from opposite ends of the guide links, :r hoolr lneniher heing on one guide lin t and nie-ins being provided on Vthe oppositeguide linlr to which the hoolr nitty 1.3 he attached end locking ineens heilig also provideffl for preventing inadvertent detnchnient ot this hook nieinher. i

lilvlith these and other objects in view, the

invention consists of certain novel features ot construction, :is will be more `fully` described, and particularly pointed out in the appended chiinis.

lfn the accompanying dra-wings:

Fig. l is e side elevation showing the chain .in dotted lines with its iniddlc portion de techehl'y connected together by my improved Fifi mehr

il :t perspeetiveview showing the atheol: extending troni the end wall Fig. 3 isn` perspective view oit' the opposite end guide link showing the slot thru its upper well permitting the hook to enter and engage the end well thereof; also showing the locltA ineinher in raised position on this link.

Fig. e perspective View showing a detail ot' the loch for the hook. u

Fig. 5 :i sotionel view showing the two in end guide linlis connected together hy zi hook with the loch ineinher psrtiollv closed 11nd honing the slide links entendible troni opposite ends oit seid guide linlrs.

Fig. 6 e. perspective view oi the links Je. shown in Fin'. 5 andilluetrziting the well of the slotted linlr pnrlinlly broken away to .how the T-heed of the hook in position therein.

Fig. 7 shows the end links as connected together hy .the hook, and the lockinemher es moved down into locked position.

securing the attaching hookto the end of o ne ofthe Uuide links.

Fig. 9 is it section on line 99 wallj to prevent the hook from being inadvertent l'v detached from the slot linkk also showing theresilient side talos ofthis lock mernberes arranged to spring over the bottoni` edgesol the slot link.

p p OffFig. 7 j illustrating the fleuves of the `locltineinber es `extending over the end of the slot linkV Fig. 8 is a detail showing the ineens "for is found inthe practical"construction end operation ot clasps oftlns character for connecting together the adjacent ends` of links of anextendihle chain, of advantage to arrange the connecting members so es not to interfere with the" eXtendihi-lityef the link,`

end of one of these guide links endheveprovided a `slot in the adjacent endof the op posite guide link `into whichthe hook iney he inserted toengirge the end well thereof ind` I have pilvoted1 e. flock Inernher on the slot link to tit down `over the slot after the hook hns heen insertedtherein to lock the hoo-k in attached position toprevent accidental sepferation of the cheinwhich is of .importance particularly where this `chain forms tu brace,- let for securing si watch in position on the wrist of the wearer?Indl the followingis a detailed `description1 ofthe present e1nhodi nient of my invention and showing one construction of h n.celet links whereby these ad- 'wmtageous results may he accomplished;

lith reference to thedrawings, l() designates the Vhook link of my improved clasp, which in this instance is shown to he of box fornihaving :t top wall 1l andanend wall 12. This end wall l2 is pierced to re ceive the shank portion `13 of the hook 14, which shank is split and riveted, as best illustinted in Fig. 8, to permanently attach the hook to this end wall.

erally extending retaining he better retained in the Cent end link 17. l ,p

n The head portion Y of this hook is preferably provided Withlatu lshoulders `15 to loo S ot 16`of the adjao This slot link is also provided with a top wall 18 and an end Wall or cross barV 19 and the slot 1G is formed thru this top Wall of a Width to receive the T-shaped head of the hook and the end wall 19 is slotted as at 2O with a narrow opening to receive the shank portion 21 oit the hook, whereby the lateral extensions 15 when in position -will he engaged by the overhanging lips 22 in the slot and so assist in preventing accidental detachment of the hook oi" one link frein the slot oi the opposite link.

ln order to further assist in locking this hook into the slot link 1C', l have provided a lock nieniber 23 which comprises a pair oit side arins 2d pivoted at 25 to the sidesv of the slot link lil' and the forward portion of this lock .is provided with a top Wall 25 and spaced end lianges Q6 which entend over the end ot the link 17 to straddle the shank 21 of the hook and so close the slot 16 thru which the hook entered. Also the side Walls of this lock nieinber are provided with inwardly set resilient tabs 2T which are designed to snap around the bottoni edge ot the link 17, see Fig. 9, to further assist in securing this lock ineniber in locked position.

Both et these links 10 and ii/"are constructed 'with iniproved means by which they are connected together and which ineens do not interfere With the sliding action oi the slide links 29, which is of importance in order to obtain the inaniinuin anionnt ot extension in the bracelet. i

My device is very simple and practical in construction and is effective in its operation and by its use the inaniinuin extendibility of the chainorv bracelet is obtained and at the `saine tinie a clasp for the bracelet is prol claiin:

1. clasp 'lor a chain comprising tvvo sepa rable end links, one having a cross har and the other having a hook arranged to extend around said cross bar, the cross )ar link also having a pivoted lock ineinber to swing over the hook and secure it` in engaged position.

2. A clasp for an entendible chain co1nprising two abutting end guide links, slide links entendible from opposite ends ot said 'uide links, a hook on one guide link, a cross ar on the other guide link engaged by said look, and. ineans on one of the incinhrs for 'eleasahly securing the hoek in engaged posi ion. Y

ik clasp tor an eXtcndible chain co1nprisingtwo abutting end guide links, slide links entendible frein opposite ends of said `guide links, a hoek on one guide link, an engaging nieinber on the other guide link engaged .by said hook, and a lock ineinber piv oted to the hook engaging guide link ar ranged to close over the engaged hook to pre vent accidental d isengageinent tlnirco il.

fi. A clasp for an entendible chain coni prising two abutting end links of boi: shape, each having top and end Walls, slide links entendible rein opposite ends of said box links, a hook extending` frein the end wall of one box link, the opposite bei; link being slotted thru its top Wall to receive the hook of the other link to engage its acont end Wall, and a pivoted lock ineinber on the slotted link to releasahly retain said hook in its slot.

5. n clasp for an entendible chain comprising tivo abutting end links of bei; shape, each having top and end Walls, slide links extendible troni opposite ends of said box links, a T- shaped hook extending from the end wall of one bof; link, the opposite be); link having a T-shaped slotin its top Wall to receive said correspondingly shaped hook to engage its end wall, and a lock ineinber piveted to the slotted link to close over the end ci' the slot and the hook therein to releasably retain the hook in attached position.

ln testimony whereof 1 aiiix iny signature.

SYLVESTER A. JG-iN/SON. 

